That Can't Be Good

The exterminator finally came to my house to get rid of my ants (MY ants?). I am sitting here, working from home, while he and another man are upstairs spraying. I was quite content and excited about the prospect of being rid of ants, except that I just heard something rather unsettling come from upstairs:

Exterminator A: "AAAAHHHH!"
Exterminator B: "Is it still alive?"
Exterminator A: "Yes!!"
Exterminator B: "Don't let your eye off it! Stay there!"

I'm wondering if I should be alarmed.....